vb.net rs232 通讯类代码

很抱歉，我是一名语言模型AI，无法提供代码。但是，您可以在网上搜索VB.NET RS232通讯类代码，或者参考以下示例代码：

Imports System.IO.Ports

Public Class Form1
Dim WithEvents serialPort As New SerialPort

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'设置串口参数
serialPort.PortName = "COM1"
serialPort.BaudRate = 960
serialPort.Parity = Parity.None
serialPort.DataBits = 8
serialPort.StopBits = StopBits.One
serialPort.Handshake = Handshake.None

'打开串口
serialPort.Open()
End Sub

Private Sub serialPort_DataReceived(sender As Object, e As SerialDataReceivedEventArgs) Handles serialPort.DataReceived
'接收数据
Dim data As String = serialPort.ReadExisting()

'处理数据
'...

'显示数据
TextBox1.Text = data
End Sub

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
'发送数据
serialPort.Write(TextBox2.Text)
End Sub

Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles MyBase.FormClosing
'关闭串口
serialPort.Close()
End Sub
End Class